Locomotive-arch.



E. P. STEVENS.

LOCOMOTIVE ARCI'L.

APPLICATION FILED ma. 1|. ms.

Patented J 11119 12, 1917.

2 SHEETS-SNEET I.

E. P. STEVENS.

LOCOMOTIVE ARCH.

APPLICATION FILED FEB-11.1916.

1M9 Patented June 12, 1917.

2 SHEETS-SHEET 2.

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@rlginal application filed March 31, 1913, Serial Ito. tttldacf Etenewed January 10, more, serial No. 713%. Divided and this application filed February 11, 191a. Serial Ito. 77,647.

Be it known that I, ENooH P. S'rnvnNs, a citizen of the United States, residin at Chicago, in the county of Cook and tate of Illinois. have invented certain new and useful Improvements in Locomotive-Arches,

of which-the following is a specification.

My invention relates to arches of refractory firebrick used in the fire-boxes of locomotives. The particular style of arch which forms the sub ect matter of-my invention is of the type usually lmown as the front arch, this arch being supported on arch tubes extending longitudinally through the firebox and slo ing downwardly fromthe ox to the lower portipn of the fine-sheet. a p

Heretofore two principal types of trout arches supported on are tubes have been employed: rst, arches in which a portion of the space between each pi the outer arch tubes and the side sheet of the fire-box was filled by extensionsof the bricks forming the two outer rows of the'arch, each of these rows being supported on two arch tubes; second, arches in which there were several i rows of bricks each supported between adjacent arch tubes (thus forming three rows of bricks ii iourerch tubes were used); and

separate side rows of bricks between the outermost arch tubes and respective side sheets, these side bricks being supported by the jointaction .oi' the side sheets and the v =ified construction.

outer arch tubes or the bricks supported thereon. 1

lit has been found by experience that there are marked disadvantages about each form of arch which I have just described. In the first type of arch it is necessary to employ bricks of great length which are difioult liable tobreakag'e. linto handle and ve arches of the secon type the vibration of the side sheets is transmitted through the side bricks to the arch, and causes vibration of.

the latter, while at the same time the side rows of bricks are apt to become displaced atone end or the other and fall down onto the bed of. fuel. 1

In my improved form of arch l avoid the dilficulties of both types 0% archies ove. emp oy a it have been described a v rality ofmain rows of bricks, the bricks of each row being supported at their op%osite' sing ends by arch tubes, each row oi bricks substantiall the width of the s ace between adjacent tu es. In this way am able to employ bricks of such dimensions that they are not liable to' breakage. lhe si'de rows of bricks which partially fill the spaces between the outer arch tubes and the side sheets constitute what I term the cantaliver bricks since these latter bricks are supported by the adjacent main rows of bricks or by the joint action of such bricks and the outer arch tubes and are not supported by nor do they rest against the side sheets of the firebox. It will be evident that as the sidebricks are supported in this manner they constitute cantaliver structures. In this way the trans mission of the vibrations of the side sheets to the arch is avoided and, moreover the. chance of having the bricks displaced and fall down onto the fuel bed is decreased.

. These and other advantagesof my inven tion will be more readily understood by reierence to the accompanying drawings, which through a locomotive fire-box, taken on the ine 1-1 of Fi 2;- I

Fig. 2 is a vertical longitudinal. section thrfio ugh the firebox, taken on the line 2-2 0.. 1g. 1

Fig. 3 is a transverse vertical section taken on the lines 3-3 and 3* x of Fig 2 Fig. 4.- is a similar section disclosing a mod- Fig.5 is a fragmentary plan of a second modified form of arch construction;

and

Fig. 6 is a vertical transverse section,

taken on the line 66 of Fig. 5.

This application is a division of my prior application original .-Serial No. 75?,822, filed March 31st, 1913, renewed January are held thereby or interlocked therewith in.

various'ways. This present divisional application is intended to especially describe and claim the forms or modifications ofthe invention which are embraced in and suggested by the structures disclosed Figs.

'10, 1916, Serial No. 71,378, and entitledhas 8 and 9 of the drawings of said applicaconstitutes the rear flue-sheet of the 1000-- motive.

On its sides the fire-box is bounded by the side sheets, 25, outside of which are the water legs, 26. At the top'of the fire-box the side sheets, 25, are joined to form the crown sheet, 27.

In the form of arch illustrated in 1 to 4, inclusive, the central row of but: 40, is supported at its edges by the two central arch tubes, 20. These brlcks, 40, are of well-known shapes and functions, and may rest on, or fit down between, the arch tubes, 20, as alternatively shown in Figs. 3 and 4. The bricks of the rows supported betweenthe two outer arch tubes on each side are of the type shown mostv clearly in Figs. 3 to 6. Each of these bricks, 42, has anend, 41, engaging an intermedlate arch tube, 20. On its opposite end, the buck, 42, is provided with a tongue, 43, WhlCh is preferably of approximately half the total width of the body of the brick. The under surface of the tongue, 43, rests on the outer arch tube, 20. It is evident that a portion.

of this tongue extends laterally slightly beyond the outer arch tube, as clearly illus trated in Figs. 3, 5, and 6. As best shown in Figs. 1 and 6, when the bricks, 42, are placed in position, a space is leftbetween the adjacent tongues, 43, this space bemg approximately the same width as that of one of the tongues, 43.

The shape .of the cantaliver bricks of the side rows is best shown in Figs. 3, 5,, and 6. Each brick, .46, has a body portion which preferably extends upwardly toward the side sheet, and gradually tagers toward sald sheet, Integral with the be y portion is the tongue, 47, adapted to engage an outer arch tube, 20. As shown, the, tongue, 47, of each of the cantaliver bricks, 46, is placed in position between the tongues, 43, of the bricks, 42.

The outer edges or ends, 46', of these bricks, 46, are clear of the side sheets, 25, thus preventing the transmission of vibration from the sidesheets to the arch- If desired, the corners of the side or marginal bricks may be out off, (as shown at46" in. Fig. 5) thereby providing more 'space in certain portions between the side bricks, 46, and the side sheets, 25. This is often of advantage to prevent the accumulation of cinders on the arch itself.

As stated, each of the bricks, 42, of this mamaeo form" of arch rests on two of the outer arch tubes, 20, the bottoms of the bricks preferably being on a line with the upper surface of the arch tubes,-although if desired bricks may be used which have sockets in their edges and so fit down between the arch tubes, in the'manner illustrated in Fig. 4.

Each of the bricks, 42, hasa tongue, 43, which rests directly on an arch tube, 20. 'On each side of the brick between the tongue, 43, and the edge of the brick is provided a beveled surface, 44, while the outer I edge of the tongue, 43, is provided with'the ledge, 45, which preferably slopes inwardly,

for the purpose presently to be described.

Each of the side cantaliver bricks, 46, has a tongue, 47, which is adapted to fit into the space between the tongues, 43; of the bricks, 42, as best shown in Fig. 5. The inner end of the tongue, 47 is provided with a beveled surface, 48, adapted to engage the beveled surfaces, 44, of two adjacent bricks, 42. Y

Between the tongues, '47, of each side brick, 46, and the edges of the brick are provided the abutments, 49, adapted to rest on the ledges, 45, of the bricks, 42. On account. of the fact that the ledges, 45, slope inwardly, they serve as locking means for preventing outward movement of the cantaliver bricks, 46.

On the bottom of each brick, 46, is preferably provided a lug, 50, which engages the arch tube, 20, and prevents outward movement of the bricks, 42, and the side bricks, 46, the bricks, 46, on the two sides of the arch thereby securely locking the latter in position.

In installing the arch it will be evident that the bricks, 42, are first placed in position, and the cantaliver bricks, 46, may then readily be adjusted.

It will be apparent to those skilled in the art that many changes can be made in the detailed construction of the arch which I have described, without departing-from the spirit or scope of my invention.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a locomotive arch construction, the combination with a fire-box having a plurality of arch tubes extending therethrough, of a plurality of main rows of bricks supported on said tubes, and a row of cantaliver bricks in'the space between each of the outer tubes and the side sheets of the fire-box, each of said cantaliver bricks being supported by the bricks of the adjacent main row, and being out of contact with said side sheets, substantially as described.

2. In a locomotive arch construction, the combination with a fire-box having a plurality of arch tubes extending therethrough, of a plurality of main rows of bricks supported on said tubes, a, row of cantaliver bricks in the space between each of the outer tubes and the side sheets of the firebox; said row of cantaliver bricks being supported by the bricks of the adjacent mam row and being out of contact with said side sheets, and means for preventing lateral movement of said arch, substantially as described.

3. In a locomotive arch construction, a firebox side sheet and a Water-circulating arch tube adjacent thereto, in combination with a main arch brick and a cantaliver brick sepa'rably interlocked with and upon the end of said main brick.

4. In a locomotive arch construction, a firebox side sheet and a "water-circulating arch tube adjacent thereto, in combination with a main arch brick and a cantaliver brick hooked upon the end of said main brick above said tube.

5. In a locomotive arch construction, two main bricks arranged side by side as upon an arch tube, in combination with a cantaliver brick having its end in abutment with lfiotg said main bricks and hooked upon 6. In a locomotive arch construction, two main bricks arranged side by side as upon an arch tube, in combination with a cantaliver brick having its end in abutment with both said main bricks and said bricks being provided with interfitting complementary tongues, and said cantaliver brick being supported by said main bricks.

7 In a locomotive arch construction, two main bricks arranged side'by side as upon an arch tube, in combination with a cantaliver brick having its end in abutment with both said main bricks and said bricks being provided with interfitting complementary tongues, said cantaliver brick being hooked upon and supported by said main bucks, and

having a depending shoulder for engagement with the inner. side of said arch tube.

8. In a locomotive arch construction fire box aside sheet and an arch tube substantially parallelin the same, in combination with a main arc brick having its outer end supported by said tube, a second brick extending therefrom substantially across the space between said sheet and tube, said second brick being supported by said main' brick in manner to positively hold the free end of the second'brick out of contact with 4 

